Dust-proof cap for tire-valves.



O. E. IVINS.

DUST PROOF CAP FOR TIRE VALVES.

APPLICATION FILED MAR.3,1914.

KQJLSLlfiM, Patented Mar. 9, 1915.

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To all whom itmay concern: v

Be it known that l, Crarroim E. lvrns', a citizen of the United States, residing at lLos Angeles', in the county of Los Angeles, State of California, have invented new and useful Improvements in Dust-Proof Caps for Tire-Valves. I

This invention relates to a dust proof cap for tire valves.

lt is the purpose of thisinvention to provide a dust cap for the valves of pneumatic tires, and the principal object is to provide a simple mechanism for maintaining the cap in place on the valve when the same is not in use, and which can be readily pperated to release the cap, when it is desired to use the valve in inflating the tire.

It further object is to provide a device of the above character which can he quickly removed and applied, and which will he securely held in place against accidental removal.

it further object is to provide a dust cap on which can he readily applied to the valve casings oil the conventional type of tire valves now generally in use.

The invention primarily resides in an in ternally threaded sleeve for screwing a valve on an externally threaded valve casing having a collar formed thereon, a removalole dust capadapted to inclose the upper end of the valve casing and to seat on the collar and sleeve, and a pivoted spring clamp for engaging the dust cap and retaining it in .place.

The invention is illustrated in the accompanying drawings, in which: 7

Figure l is a view in side elevation illustrating the cap in'place on a tire valve. 1F ig. 2 line 2-2 at Fig. 1., illustrating the manner oil securing the cap in place and indicating the manner in which it is released in dotted lines. Fig. 3 is an enlarged horizontal sec- 1 tion on the line H o l Fig. 2.

More specifically, 5 indicates the enternally threaded cylindrical casing out the ordinary pneumatic tire valve having the usual cap 6 for closing the valve casing screwed on its upper end.

The present invention resides in an auxiliary means for incasing the upper portion of the valve casing by which dust will he edectively excluded therefrom. 'llhis means includes an internally threaded sleeve or nut l, which is preferably henagonal in a tenua e of Letters Patent.

dome-shaped end of the dust cap. arms 15 are further connected together by is a detail vertical section on the Patented than... n, with.

application has than a, rant. hcrtal no. aaaaaa outlines, as shown in Fig. 3, tofacilitate its engagement with a wrench or similar tool, by which it may be screwed on or removed from the stem. A jam nut 8 is provided which nut is screwed on the stem 5 beneath the sleeve 7 against which the lat ter is jammed in the usual manner to prevent its working loose on the valve casing.

Formed on the upper face of the sleeve 7 is a collar 9 having a cylindrical outer face preferably slightly tapered from its juncture with the sleeve 7 toward its outer end. This collar being formed integral with the sleeve 7 and having its interior threaded in continuation at the threaded interior of the sleeve. The collar 9 forms a centralizing and lateral support for a removable dust cap 10 which is-cylindrical in form and has its upper end closed by a domeshaped end wall ll, and itslower end open and formed with a head 12 adapted to seat on the sleeve 'Z; the inner surface of the lower portion of the cap being adapted to snugly fit the collar 9.

lPivoted at it on opposite sides of the sleeve 7 are parallel arms 15 which are adapted to extend upwardly on opposite sides ot' the dust cap 10 and are connected together at their upper ends by means of the curved portion 16 conforming to the means of a semi-circular strap 17 at a point adjacent their upper ends, loy which they are hraced in relation to each other to render them sulostantial; this strap conforming to the lateral periphery of the dust cap and serving as a stop for limiting the movement of the arms in one direction away from the dust cap. The strap 17 is connected to the portion 16 by means or astrap 18 which is continued beyond the outer edge of the portion 16 and slightly upturned to'itorm a handle 19. Formed in the upper end ll of the dust cap is a socket or depression 20 adapted to receive a boss 21 formed on the underside of the portion 16 oil the arms 15 centrally thereof, which hose is adapted to normally spring into the soclret 20 by reason of the resiliency of the portions 16 and 18 ol' the arms so as to clamp the dust cap 10 in position, as particularly shown in Fig. 2.

When it is desired to remove the dust cap, the arms 15 are rocked into the position indicated in dotted lines in Fig. 2 through the ill) medium of the handle 19, or by pressing the arms rearwardly. This frees the cap and permits of its being readily removed to give access to the valve casing 5.

From the foregoing it will be seen that l have provided a dust cap which can he quickly removed and applied, and which will be effectively held in place by means of the clamping action of the arms 15.

\Vhat I claim is:

1. A dust cap for pneumatic tire valves, comprising a sleeve adapted to he threaded on the valve casing, a cap adapted to inclose the end portion of the valve casing and to seat on the sleeve, an arm pivoted on said sleeve and resilient clamping means on said arm for retaining the dust cap in position.

.2. In a dust cap for pneumatic tire valves, a sleeve threaded to be screwed on the valve casing, a cap adapted to seat on said sleeve to inclose the outer end of the valve casing, a pair of connected arms pivarms on said sleeve having a boss thereon adapted to en 'age a socket formed in the cap, whereby the latter is retained in position on the sleeve.

In witness that I claim the foregoing I have hereunto subscribed my name this 12th day of February, 1914.

CLIFFORD E. IVINS.

Witnesses lvlanonnnrra BATES, MARIE Bamr. 

